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Astronaut Sounds Alarm On Asteroids

4 Nov 2013, 22:55 UTC
Astronaut Sounds Alarm On Asteroids
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At a symposium on the danger of asteroid impacts, Apollo astronaut Rusty Schweickart said it's time for the planet to develop a strategy should a big rock come our way. Clara Moskowitz reports.

-- Read more on ScientificAmerican.com

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